Random triples
| Subject | Object |
|---|---|
| gptkb:rational_elliptic_surface | blow-up of the projective plane at 9 points |
| gptkb:Real_projective_plane | sphere with antipodal points identified |
| gptkb:2-dimensional_torus | product of two circles |
| gptkb:real_projective_plane | sphere with antipodal points identified |
| gptkb:2-dimensional_torus | quotient of R^2 by Z^2 |
| gptkb:hyperelliptic_surfaces | quotient of a product of two elliptic curves by a finite group |